Intra-cochlear electrode tip fold-over

Abstract

Cochlear implantation has been performed safely for over two decades but still has various minor and major complications. We report two cases of an unusual complication of electrode implantation: tip fold-over of the electrode array within the cochlea. Both cases required undergoing explantation and re-implantation. The frequent use of fine and pre-curved electrodes particularly with the use of an insertion tool necessitates routine postoperative radiological evaluation of the electrode array. Our cases demonstrate the benefit of systematic imaging including the possible use of the Cone Beam CT intraoperatively.

KEYWORDS:

• Cochlear implant complication
• Cochlear implant revision
• Electrode array deformity
• Tip fold-over
• Insertion tool